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US 11,512,657 B2Granted
Outboard motor and control method for outboard motor
AssigneeYamaha Hatsudoki Kabushiki Kaisha
InventorHiroshi Inoue
Life of this patent
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Abstract
A controller performs hydrolock prevention control when an engine is started. The controller determines whether a crankshaft rotates a predetermined number of times upon starting the engine without ignition of the engine. The controller performs the ignition of the engine after the crankshaft rotates a predetermined number of times.
Claims18
An outboard motor comprising:
- an engine including a cylinder and a crankshaft;
- a controller configured to perform hydrolock prevention control upon starting the engine;
- and
- an output device controlled by the controller, wherein
- the controller is configured to:
- upon starting the engine, determine whether the crankshaft rotates a predetermined number of times without igniting the engine by the controller, and
- perform ignition of the engine after the crankshaft has rotated the predetermined number of times;
- and
- in the hydrolock prevention control, the controller is further configured to cause the output device to output a predetermined warning without performing the ignition of the engine when the crankshaft stops before rotating the predetermined number of times.
6 more elements
A control method for an outboard motor, the control method comprising:
- performing hydrolock prevention control, including:
- upon starting an engine, determining whether a crankshaft rotates a predetermined number of times without the engine;
- performing ignition of the engine after the crankshaft rotates the predetermined number of times;
- and
- causing an output device to output a predetermined warning without performing the ignition of the engine when the crankshaft stops prior to rotating the predetermined number of times.
2 more elements
A control method for an outboard motor, the control method comprising:
- detecting a predetermined condition indicative of possibility of water entering a cylinder;
- and
- performing hydrolock prevention control, including:
- upon starting an engine, determining whether a crankshaft rotates a predetermined number of times without ignition of the engine, and
- performing the ignition of the engine after the crankshaft rotates the predetermined number of times, wherein
- the hydrolock prevention control is performed when the predetermined condition is detected.
3 more elements
Dependencies are inferred from the claim text.